Split cart into 4 microservices: relations, likes, orders, page-config→blog

Phase 1 - Relations service (internal): owns ContainerRelation, exposes
get-children data + attach/detach-child actions. Retargeted events, blog,
market callers from cart to relations.

Phase 2 - Likes service (internal): unified Like model replaces ProductLike
and PostLike with generic target_type/target_slug/target_id. Exposes
is-liked, liked-slugs, liked-ids data + toggle action.

Phase 3 - PageConfig → blog: moved ownership to blog with direct DB queries,
removed proxy endpoints from cart.

Phase 4 - Orders service (public): owns Order/OrderItem + SumUp checkout
flow. Cart checkout now delegates to orders via create-order action.
Webhook/return routes and reconciliation moved to orders.

Phase 5 - Infrastructure: docker-compose, deploy.sh, Dockerfiles updated
for all 3 new services. Added orders_url helper and factory model imports.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

likes/bp/actions/routes.py

@@ -0,0 +1,81 @@
+"""Likes app action endpoints."""
+from __future__ import annotations
+
+from quart import Blueprint, g, jsonify, request
+
+from shared.infrastructure.actions import ACTION_HEADER
+
+
+def register() -> Blueprint:
+    bp = Blueprint("actions", __name__, url_prefix="/internal/actions")
+
+    @bp.before_request
+    async def _require_action_header():
+        if not request.headers.get(ACTION_HEADER):
+            return jsonify({"error": "forbidden"}), 403
+        from shared.infrastructure.internal_auth import validate_internal_request
+        if not validate_internal_request():
+            return jsonify({"error": "forbidden"}), 403
+
+    _handlers: dict[str, object] = {}
+
+    @bp.post("/<action_name>")
+    async def handle_action(action_name: str):
+        handler = _handlers.get(action_name)
+        if handler is None:
+            return jsonify({"error": "unknown action"}), 404
+        try:
+            result = await handler()
+            return jsonify(result)
+        except Exception as exc:
+            import logging
+            logging.getLogger(__name__).exception("Action %s failed", action_name)
+            return jsonify({"error": str(exc)}), 500
+
+    # --- toggle ---
+    async def _toggle():
+        """Toggle a like. Returns {"liked": bool}."""
+        from sqlalchemy import select, update, func
+        from likes.models.like import Like
+
+        data = await request.get_json(force=True)
+        user_id = data["user_id"]
+        target_type = data["target_type"]
+        target_slug = data.get("target_slug")
+        target_id = data.get("target_id")
+
+        filters = [
+            Like.user_id == user_id,
+            Like.target_type == target_type,
+            Like.deleted_at.is_(None),
+        ]
+        if target_slug is not None:
+            filters.append(Like.target_slug == target_slug)
+        elif target_id is not None:
+            filters.append(Like.target_id == target_id)
+        else:
+            return {"error": "target_slug or target_id required"}, 400
+
+        existing = await g.s.scalar(select(Like).where(*filters))
+
+        if existing:
+            # Unlike: soft delete
+            await g.s.execute(
+                update(Like).where(Like.id == existing.id).values(deleted_at=func.now())
+            )
+            return {"liked": False}
+        else:
+            # Like: insert new
+            new_like = Like(
+                user_id=user_id,
+                target_type=target_type,
+                target_slug=target_slug,
+                target_id=target_id,
+            )
+            g.s.add(new_like)
+            await g.s.flush()
+            return {"liked": True}
+
+    _handlers["toggle"] = _toggle
+
+    return bp